Dragonborn is the next DLC for Skyrim and at the moment is only available for Xbox 360 users. Dragonborn will be available for download for 1600 Microsoft Points on Xbox LIVE® on December 4th.
This DLC seems to be an add on to the Skyrim adventure allowing extra content for you to explore and extra quests (hopefully). Dragonborn from the trailer seems to be about the first Dragonborn which has arisen from its grave because as well all know in these games dead does not mean dead.
That being said it is a good looking trailer just a shame I will personally have to wait being a PC gamer for Skyrim. There is no set date for both PC gamers and PS3 gamers, any news on it will be covered here so keep checking back!
While you and I wait if you have not already you can download Heartfire the previous DLC which allows you to make your own dream home in the world of Tamriel and raise your lovely family.